Precussive tool.



Ll c. HAYLES.

PERCUSSIVE TOOL.

APPLICATION FILED FEB. 3.1912.

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T.. C. BAYLES.

FERCUSSIVE TOOL.

APPLICATION FILED rsa. 3. 1912'.

1.134,71. Patented Apr.6,1915.

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LEWIS C. IBAYLES, OF EASTON, PENNSYLVANIA, ASSIGNOB T0 INGERSOLL-RANDCOMPANY, 0F NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

PERCUSSIVE TOOL.

specification of Leiters Patent.

Application led February 3, 1912. Serial No. 675,288.

shaft with a ratchet 17 and the piston 10 v `citizen of the UnitedStates, and resident of Easton, in the county of Northampton and Stateof Pennsylvania, have invented a new and useful Improvement inPercussive Tools, of which the following is a specification.

The object: of this invention is-to provide a novel rotation device forpercussive tools.

In the accompanying drawings, Figure 1 represents a percussive vtool ofthe piston hammer type in longitudinal central section with my improvedrotation device applied thereto. Fig. 2 is a transverse section taken inthe plane of the line A-A of Fig. 1, Fig. 3 is a transverse sectiontaken in the plane of the'line B-B of Fig. 1, and Fig. 4 is adiagrammatic view showing more clearly the construction of thecontrolling valve, its chamber and the assages leading to the workpiston cham r and rocking piston chamber.

The tool cylinder is denoted by 1, the front head by 2, the back head by3, the handle by 4, and the controlling valve chest by ,5. The workpiston 6 is tted to reciprocate in its chamber 7 and is controlled inits movements by the valve 8. A plate 9 is interposed between the fronthead 2 and the cylinder 1. The back head 3 is herein shown Aascomprising three members interposed between'the handle 4 and thecylinder 1. Alluid pressure operated rocking piston 10 is located in thechamber 11 and the rocking movements of this iston `10 are controlled bythe valve 8. A chuck l2 is rotatably mounted in the front head 2, whichchuck is adapted to receive a shank of the tool steel 13, the rear endof which steel is arranged in position to be struck. by the hammerliston 6.

A rotary shaft 14 'exten through the cylinder 1, into the front head 2,and back head 3, which shaft forms a driving connection between therotation piston 10 and the chuck12. In the present instance, the frontend of the shaft is provided with a inion 15 which meshes with a ear 16.on t e chuck 12. Means are provi ed for clutching the rotation piston 10and releasing it from the shaft 14., by providing the rear end of thewith -av spring-pressed pawl 18 coacting therewith. This pawl 18 isshown as comprisingfa plate having two stem guides 20, 21, upon whichthe springs22, 23, act. IThe rear end of the shaft 14 extends into thebore 19 of the rocking rotation piston 10, so that the axes of thepiston and shaft are coincident.

The valve 8 herein shown is the well known double-winged type in whichone wing controls the inlet passages 24, 25, lead-e ing to the oppositeends of the work-piston chamber 7 and the passages 26, 27, leading tothe opposite sides of the rocking piston chamber 11, and the other wingcontrols the exhaust passages 28, 29, leading to the work piston chamberintermediate the inlet pas'- sages 24, 25.

It will be seen thata rotation device constructed'and arranged as hereinshown and described is very compact and may be ,f

readily assembled and disassembled.

while I have Shown and described this r0- i front and back heads, av:chuck rotatablyA mountedin said front'head, a shaftextending from saidfrontl to said back head, gearing between said chuck and the `front endof said. shaft, an oscillating piston trunnioned: on the rear endof saidshaft, and having a driving wing projecting into said back head rearwardof said cylinder and a pawl" and ratchet connection between said pistonand' said shaft.

2. In a -percussive tool, a cylinder, its

front and back heads, a chuck rotatably mounted in said front head, ashaft extend ing from said front to-said back head, hatV ing its forwardend geared to said chuck., a. ratchet on the rear end of said shaft an`zg 1,13 svg:

oscillating piston trumaoned axially sadl presence of two Witnesses, $4is first day Q shaft, havmg a C11-Fung Wmg projectmg mi@ Febmary 1912,

said back headrearward of said cylnda TE f l BAY and a pawl 1n. saldwmf.; @ngagmg sind u W S C J L U ratchet Wlmesse in lstumoxuy7 that i01mm 'the m'egomg GEORGE BARRY? as my invention, have signed my name inC., S SUNDGREN.

